We now only support deploying Ceph before overcloud deployment
as described in deployed_ceph.rst.
Remove cephadm.rst and ceph_config.rst which describe deploying
Ceph during overcloud deployment. ceph_config.rst covered use
of ceph-ansible or puppet-ceph which was deprecated so it needs
to be removed. Relevant content on configuring Ceph during the
overcloud deploy from cephadm.rst was moved to deployed_ceph.rst.
Remove or replace references to ceph_config as appropriate.
The deprecated ceph_config documentation for puppet-ceph and
ceph-ansible is still available in wallaby branch [1].
[1] https://docs.openstack.org/project-deploy-guide/tripleo-docs/wallaby/features/ceph_config.html
Change-Id: I521b0855bc1476e715731f4ebe0d09bb4b39963d
7a92221c4d